April 18 » The Greco-Turkish War is declared between Greece and the Ottoman Empire.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
July 26 » Anglo-Afghan War: The Pashtun fakir Saidullah leads an army of more than 10,000 to begin a siege of the British garrison in the Malakand Agency of the North West Frontier Province of India.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
December 30 » The British Colony of Natal annexes Zululand.
Day of marriage June 11, 1920
The temperature on June 11, 1920 was between 9.1 °C and 24.4 °C and averaged 17.2 °C. There was 11.8 hours of sunshine (71%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
March 12 » The Kapp Putsch begins when the Marinebrigade Ehrhardt is ordered to march on Berlin.
April 15 » Two security guards are murdered during a robbery in South Braintree, Massachusetts. Anarchists Sacco and Vanzetti would be convicted of and executed for the crime, amid much controversy.
April 23 » The Grand National Assembly of Turkey (TBMM) is founded in Ankara. The assembly denounces the government of Sultan Mehmed VI and announces the preparation of a temporary constitution.
August 31 » Polish–Soviet War: A decisive Polish victory in the Battle of Komarów.
September 16 » The Wall Street bombing: A bomb in a horse wagon explodes in front of the J. P. Morgan building in New York City killing 38 and injuring 400.
October 25 » After 74 days on hunger strike in Brixton Prison, England, the Sinn Féin Lord Mayor of Cork, Terence MacSwiney dies.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I132157.php : accessed October 22, 2026), "Tjeerd Rintjema (1897-????)".
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